The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 2010
Filed:
Feb. 07, 2007
Hiroaki Mizoguchi, Susono, JP;
Takahiko Fujiwara, Susono, JP;
Kunihiko Nakata, Mishima, JP;
Kenji Sakurai, Gotenba, JP;
Hiroki Ichinose, Fujinomiya, JP;
Masaaki Kawai, Kakegawa, JP;
Atsunori Hirata, Aki-gun, JP;
Hiroaki Mizoguchi, Susono, JP;
Takahiko Fujiwara, Susono, JP;
Kunihiko Nakata, Mishima, JP;
Kenji Sakurai, Gotenba, JP;
Hiroki Ichinose, Fujinomiya, JP;
Masaaki Kawai, Kakegawa, JP;
Atsunori Hirata, Aki-gun, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
The combustion air-fuel ratio is made leaner than the stoichiometric air-fuel ratio at the time of engine startup and the combustion air-fuel ratio is made richer than the stoichiometric air-fuel ratio and the exhaust downstream part of the three-way catalyst apparatus is raised in temperature when it is judged that just the exhaust upstream part of the three-way catalyst apparatus arranged in the engine exhaust system has been raised to the catalyst activation temperature.